Rolling-mill.



C. THICKETT & W. HAWKSWORTH.

ROLLING MILL.

APPucATIoN FILED SEPT. 26. 1916.

Patented Sept. 1l, 191?.

3 SHEETS-SHEET I.

C. THLCKETT L W. HAWKSWORTH.

ROLLING MILL.

APPLICATION HLED sEPLzs. 1916.

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C. THICKETT @L W. HAWKSWORTH.

ROLLING MILL.

" APPLICATION FILED SEPT.26. 1916.

Patented Sept. Il, 1917.

3 SHEETS-SHEET 3.

CHARLES THICKETT AND .WILLIAM HAWKSWORTH, OF DEEPCAR, NEAR SHEFFIELD, ENGLAND, ASSIGNORS T0 SAMUEL FOX & COMPANY LIMITED, 0F SHEFFIELD,

ENGLAND.

ROLLING-MILL.

Specification of Letters Patent.

Patenten sept. ir, mit.

Application led September 26, 1916. Serial No. 122,267.

To all whom t may concern:

Be it known that we, CHARLES THICKETT, a subject of the King of Great Britain and Ireland, and residing at The lVillows, Deepcar, near Shetlield, in the county of York, England, and WILLIAM HAwKswoRTH, a subject of the King of Great Britain and Ireland, and residing at Ashfield Terrace, Deepcar, near Shettield, in the county of York, England, have invented certain new and useful Improvements in Connection with Rolling-Mills, of which the following is a specification.

This invention relates to improvements in connection with rolling mills that are to be employed particularly :tor the rolling of round bars, the object being to produce a round bar in a manner that will obviate the loss that has hitherto arisen due to the bar when passing through certain of the rolls moving in position, becoming twisted or having waste of metal due to the formation of fins thereon.

Our invention also relates to the manner in which we enable round bars to be rolled by means of guides that we place upon the mill through which the bars may be passed to enter the rolls, such guides to be of solid or ordinary form not requiring that pressure should be exerted upon the bar when passing through and not needingthat any special mechanism or pressure receiving or producing apparatus should be employed therewith.

In the mills at present employed for rolling bars of steel or other metal it has been customary hitherto to form the bar when passing through the earlier rolls somewhat of oval section and to introduce this oval form into the final pass of the rolls by turning it up, on its more or less painted end and feeding it by hand therethrough, or directing it through guides upon wir ich hydraulic or other pressure has been necessary to keep the oval bar. from moving or twisting when thus being drawn through the rolls.

According to our invention we shape our rolls for producing the round bar in such a manner that the initial stages or earlier passes of the rolls produce not an oval section but a section two sides of which are rectilinear and the other two sides (or ends) curved in form. We then pass this specially shaped bar through the final rolls by turning such up on to one of its curved ends with the rectilinear sides vertically disposed and running between guides against which these vertical sides can bear in such a manner as to keep them in true linear position or entering the rolls without liability of twisting and without needing that they should be subjected to pressure when so passing through the guides thus employed.

7e employ for guiding our improved shape of bar any ordinary square or rectilinear solid type of guide such as may be commonly used at the present time for other rolling operations, or we may make a boxlike or channel-like guide through which the special bar can readily and freely pass with its rectilinear 'surfaces bearing against the guiding members of the device through which it passes.

The accompanying drawings illustrate one mode of carrying out the invention.

Figure 1 is a view showing what might he the original form of the bar that is to be rolled int-o a round.

Fi 2 illustrates the form of the bar after initially passing through the rolls, and

Fig. 3 shows the final section of the bar.

Figs. 4, 5 and 6 illustrate in side elevation, sectional plan and end and cross-sectional elevation one form of guide that may be adopted in accordance with the invention.

According to this method of carrying out the invention the bar a, which may have an initial shape such as is shown in Fig. 1, is passed through the rolls so that in the initial stages it is made to assume a shape such as is shown in Fig. 2 wherein two sides c of the bar are rectilinear and the other two sides d, e are curved or arcuate in form. The bar is then turned up on to one of its curved sides as shown in Fig. 6, and passing through any suitable guide by which it is tirmly held in position without pressure due to the contacting of the rectilinear faces Z, c with the guide, is passed through the later stages of the rolls so that it assumes finally the round form shown in Fi 3.

Igt will be understood that any suitable form of guide may be employed, the form lillustrated in the drawings comprising a.

guide box f in which are located the ide plates g, the latter being preferably a justable by means of set screws k or otherwise to enable the dimensions of the guide to be varied as may be desired.

We out our rolls z' in such a manner and with curves formed to produce the sections hereinbefore described varying the extent and form of the cutting to suit the precise section that we are .desirous of producing for enabling the final round bar to be readily and rapidly rolled.

By this our improved method of forming our rolls and guiding thebar therethrough .we are enabled to roll without ashaped guide and more quickly and-with a much simpler adjustment of the rolls and guides than has been hitherto possible, also avoiding any turning down, twisting or lapping of the finished bar while fewer passes can be used by this process than has hitherto been necessary in the ordinary forms of rolling mills and devices employed for producing round bars.

Having now described our invention,

by Letters Patent is 1. A method of rolling round bars according to which in the initial stages the l bar is made to assume a form in which two sides are rectilinear while the other two sides or ends are curvilinear.

2. A method of rolling round bars which consists in rst forming the bar such that two sides are rectilinear while the other two sides or ends are curvilinear and subsequently finishing the bar circular in crosssection.

3. A method of rolling round bars which consists in initially forming the bar with two sides rectilinear and the other two sides or ends curvilinear, turning the bar on to one of its curved ends and passing the same between plain guides in contact with the rectilinear sides to rolls for producing the round.

In testimony whereof., we have aixed our 

